I saw the entire series when they came out on Discovery Channel. I was shocked to see the footage of killer whales taking out a blue whale calf. I was mezmerized to see funky green/blue lights 2 miles under the sea. I was wowed to see them go back to a whale carcass 18 months later to find sea life still thriving on it. They would show all levels of the ecosystem, from plankton and bacteria to whales to sharks, back to plant life and all the way back. The only drawback I found was only seeing it in fullscreen mode on a widescreen monitor. Now, with these DVDs in anamorphic widescreen, I can enjoy this with my whole family for years to come. the summary is true to form when they say it's a current complete natural history of the oceans, but think of it more as a tribute to aquatic life on this planet, this "bright blue ball, just spinning, spinning free, dizzy with Eternity!"